{"product_id":"jmchstore-performance-carburetor-for-79-105cc-mini-bikes-replaceable-main-jet-tunable-low-speed-jet","title":"JMCHstore Performance Carburetor for 79–105cc Mini Bikes — Replaceable Main Jet, Tunable Low-Speed Jet","description":"\u003cp\u003e\u003cstrong\u003eHigh-flow replacement carburetor for 79–105cc mini bikes and gas bikes that preserves factory throttle feel while adding a richer main jet and tunable low-speed jet for improved engine response.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis JMCHstore performance carburetor is built as a direct-fit upgrade for a wide range of small-displacement engines including Monster\/Mega Moto MM-B80\/MM-B105, Motovox MBX10 series, Mototec 105cc, Coleman B100\/RB100, Baja DB30 97cc and many Lifan-based 79–105cc bikes. It keeps the original mounting layout and throttle geometry so installation is straightforward, while supplying a larger main jet and an oversized low-speed jet to help engines that have been modified or that need richer fueling after exhaust or intake changes. A horizontal fuel outlet, new idle adjuster and included breather filter make it practical for conversions where the stock airbox is removed.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this carb improve throttle response and power?\u003c\/h3\u003e\n\u003cp\u003eThe carburetor increases airflow and ships with a richer main jet to match that added air volume. That richer main jet helps prevent lean conditions at mid-to-high throttle and supports more consistent power delivery when the bike has an upgraded exhaust or drilled muffler. The improved throttle spring and preserved factory throttle geometry maintain a predictable, factory-like feel.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRicher replaceable main jet for better mid\/high-throttle fueling\u003c\/li\u003e\n  \u003cli\u003eThrottle spring and design retain original control feel\u003c\/li\u003e\n  \u003cli\u003eHorizontal fuel outlet for reliable fuel flow during installation changes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this carb let my engine idle properly after exhaust or intake changes?\u003c\/h3\u003e\n\u003cp\u003eYes — the carb arrives with a large low-speed (pilot) jet to help engines that would otherwise race or stall after modifying the muffler or removing the airbox. The new idle speed screw and spring let you fine-tune idle RPM easily, and the package includes gaskets and fittings needed for a clean install.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLarge low-speed jet included to stabilize idle after modifications\u003c\/li\u003e\n  \u003cli\u003eAdjustable idle screw and spring for precise idling\u003c\/li\u003e\n  \u003cli\u003eGaskets, fuel line, clamps and fuel filter provided for complete swap\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs this carburetor compatible with my mini bike or gas bike model?\u003c\/h3\u003e\n\u003cp\u003eThis unit was designed to fit many popular 79–105cc platforms. It is compatible with Monster\/Mega Moto MM-B80 and MM-B105, Motovox MBX10\/MBX11\/MBX12, Mototec 105cc, Coleman B100\/RB100, Baja DB30 97cc and similar Lifan 152-3 engines, plus several Phatmoto and Mega Moto 79–80cc models. Check mounting points and throttle linkage against your current carb to confirm physical fit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits MM-B80, MM-B105, MBX10\/MBX11\/MBX12, Mototec 105cc, Coleman B100\/RB100\u003c\/li\u003e\n  \u003cli\u003eCompatible with Baja DB30 97cc and many Lifan-based engines\u003c\/li\u003e\n  \u003cli\u003eIncludes breather filter for valve-cover vent when removing stock airbox\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat hardware and parts come in the box to make installation easier?\u003c\/h3\u003e\n\u003cp\u003eThe kit arrives ready to install with a generous set of replacement parts so you can swap carburetors with minimal additional purchases. It includes jets for richer main and larger low-speed operation, a fuel filter and hose, clamps, and multiple gaskets. The included breather solves the common valve-cover vent issue when the stock airbox is removed.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × carburetor, 1 × rich main jet, 1 × large low-speed jet\u003c\/li\u003e\n  \u003cli\u003e1 × fuel filter, 1 × fuel line, 2 × hose clamps, 3 × gaskets\u003c\/li\u003e\n  \u003cli\u003eAir filter breather for valve-cover vent tube when airbox is removed\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Riders who own small-displacement minibikes, dirt bikes or gas bikes with 79–105cc engines and who want a straight-forward replacement carb that maintains stock throttle characteristics while providing richer fueling for modified exhausts, drilled mufflers, or removed airboxes. It's also suited for mechanics and hobbyists who prefer a plug-and-play upgrade with the essential jets and hardware included.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this carb fit my 105cc Mototec or Coleman B100?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It's designed to be a direct-fit replacement for Mototec 105cc and Coleman B100\/RB100 style carbs, but verify throttle linkage and mounting dimensions before purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include jets and hardware to start tuning right away?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The package includes a rich main jet, a large low-speed jet, fuel filter, fuel line, clamps and gaskets for immediate installation and basic tuning.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"JMCHstore","offers":[{"title":"Default Title","offer_id":55162520076631,"sku":"B0BY97PBCN","price":30.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/jmchstore-carb-front-overview.jpg?v=1790337012","url":"https:\/\/britishgarage.co.uk\/products\/jmchstore-performance-carburetor-for-79-105cc-mini-bikes-replaceable-main-jet-tunable-low-speed-jet","provider":"British Garage","version":"1.0","type":"link"}